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Cited by 631

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Baroreflex sensitivity, clinical correlates, and cardiovascular mortality among patients with a first myocardial infarction. A prospective study.

Open access
La Rovere, M T, Specchia, G, Mortara, A, Schwartz, P J·1988·Circulation

Abstract

Experimental studies have shown that among dogs with a healed myocardial infarction, depressed baroreflex sensitivity (BRS) identifies a subgroup at higher risk for sudden death. We have examined the relation among BRS, several clinical cardiovascular variables, and subsequent mortality in 78 patients below the age of 65 years who have had a first myocardial infarction. BRS was assessed by calculating the regression line relating phenylephrine-induced increases in systolic blood pressure to the attendant changes in the RR interval. A reduced BRS primarily reflects an impairment in the vagal efferent component of the baroreceptor reflexes. The BRS of the entire population was 7.8 +/- 4.9 msec/mm Hg. BRS was lower among patients with an inferior myocardial infarction (6.1 +/- 3.3 vs. 8.9 +/- 5.8 msec/mm Hg, p = 0.03), with a three- versus a one-vessel disease (4.8 +/- 2.7 vs. 7.1 +/- 3.1 msec/mm Hg, p = 0.04), and with episodes of ventricular tachycardia (5.1 +/- 3.0 vs. 8.3 +/- 5.1, p = 0.03). There was no correlation between BRS and left ventricular ejection fraction or with mean pulmonary capillary wedge pressure at peak exercise, but a correlation (r = 0.35, p less than 0.001) was present with exercise tolerance. During the 24 months mean follow-up period, there were six cardiovascular deaths (7.6%), and four were sudden.(ABSTRACT TRUNCATED AT 250 WORDS)

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Crossref · 10.1161/01.cir.78.4.816

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Metadata

Authors
La Rovere, M. T., Specchia, G., Mortara, A., & Schwartz, P. J.
Venue
Circulation
Published
1988-10
Volume
78
Issue
4
Pages
816-824
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2139470316
Cited by
631
References
2
FWCI
14.16
Type
journal article
Language
en
Open access
bronze

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